feat(cctv): add the Autostrada del Brennero (A22) motorway webcams

Closes bilawalsidhu/gods-eye-view#155. The first Italian cameras: the 13
webcams along the A22 from the Brenner Pass to Modena.

The camera list is one keyless request to the Open Data Hub (NOI Techpark)
tourism API, which republishes Autobrennero's own list with coordinates
and kilometre markers. Frames are the operator's stills, refreshed about
once a minute, and only each camera's own WebCamImg/km<N>.jpg is
registered. The catalog fetch refuses redirects and is size-capped.

The road climbs from ~20 m in the Po valley to ~1,370 m at the Brenner
Pass, so ground elevation comes from a per-kilometre table sampled from
the Copernicus GLO-90 DEM instead of one flat prior. Headings use the
id-hash fallback at low confidence. CCTV_A22_ENABLED=0 disables the pack.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

server/providers/cctv/constants.js

@@ -267,6 +267,39 @@ export const NORWAY_ANCHORS = [
   { lat: 69.6492, lon: 18.9553 }, // Tromsø
 ];
 
+/** Autostrada del Brennero (A22, Brenner–Modena) webcams: the keyless Open
+ * Data Hub (NOI Techpark, South Tyrol) tourism API republishes Autobrennero's
+ * own camera list with coordinates, one request for the whole motorway
+ * (13 cameras). Frames are stills on the operator's host, refreshed about
+ * once a minute. */
+export const DEFAULT_A22_CCTV_URL =
+  'https://tourism.api.opendatahub.com/v1/WebcamInfo?source=a22&pagesize=200&removenullvalues=true';
+/** The only origin A22 camera frames may come from: `km<N>.jpg` per camera. */
+export const A22_IMAGE_ORIGIN = 'https://www.autobrennero.it/WebCamImg/';
+/** Hard ceiling on the catalog body. The whole motorway is ~45 KB. */
+export const A22_MAX_CATALOG_BYTES = 2 * 1024 * 1024;
+/** Orthometric ground elevation (m) at each camera, keyed by its motorway
+ * kilometre, from the Copernicus GLO-90 DEM via Open-Meteo's elevation API.
+ * The feed's coordinates are 2D and the road climbs from the Po valley (~20 m)
+ * to the Brenner Pass (~1,370 m), so one flat prior would bury the Alpine
+ * cameras. A camera not listed here uses A22_DEFAULT_GROUND_ELEVATION_M. */
+export const A22_GROUND_ELEVATION_BY_KM = Object.freeze({
+  1: 1365,
+  68: 375,
+  77: 301,
+  100: 219,
+  129: 206,
+  138: 204,
+  159: 175,
+  205: 188,
+  228: 72,
+  240: 38,
+  272: 16,
+  285: 19,
+  313: 40,
+});
+export const A22_DEFAULT_GROUND_ELEVATION_M = 200;
+
 /** DelDOT CCTV: one keyless statewide JSON catalog; live video via RTMP-over-HTTP (rtmpt:80). */
 export const DELDOT_CCTV_URL = 'https://tmc.deldot.gov/json/videocamera.json';
 export const DEFAULT_DELDOT_MAX_SOURCES = 300;